blinkingled
Premium Member
- Model Number
- MDB9979SKZ0
- Brand
- Maytag
- Age
- 1-5 years
2 year old Maytag MDB9979SKZ0 dishwasher has been unresponsive (no lights on control panel, no drain motor activation on startup);
Tech sheet W11366142A (see attachment which is Rev C instead of A but wiring diagram appears identical)
Tried the following:
1. Disconnected the control panel from control board; reset breaker (dedicated circuit); Board/ACU initialized (fast blinking) followed by slow blinking (which is considered normal ACU operation per tech sheet); NO sound from drain motor
2. Ordered and replaced a new control board W11410063 and repeated step 1 (same response, no activation of drain motor)
3. Verified door switch for connectivity by meter
4. Inspected old control board connections; no burnt traces on PCB.
5. Tried searching for thermal fuse on parts websites ; They recommend a new wiring harness W11397505
6. Inspected existing wiring harness; the black load wire to the board has an inline fuse which looks dark brown/discolored (see image); However, non contact voltage tests normal on the black load wire on either side of the fuse; despite brown discoloration on the end of the fuse, the wire element looks unbroken by my assessment
The dishwasher has been used sparingly and otherwise worked great. The only service done was a Maytag recommended replacement of the heater element (complimentary) appx 2 months ago. Any ideas welcome. Thank you for your time and input.
Tech sheet W11366142A (see attachment which is Rev C instead of A but wiring diagram appears identical)
Tried the following:
1. Disconnected the control panel from control board; reset breaker (dedicated circuit); Board/ACU initialized (fast blinking) followed by slow blinking (which is considered normal ACU operation per tech sheet); NO sound from drain motor
2. Ordered and replaced a new control board W11410063 and repeated step 1 (same response, no activation of drain motor)
3. Verified door switch for connectivity by meter
4. Inspected old control board connections; no burnt traces on PCB.
5. Tried searching for thermal fuse on parts websites ; They recommend a new wiring harness W11397505
6. Inspected existing wiring harness; the black load wire to the board has an inline fuse which looks dark brown/discolored (see image); However, non contact voltage tests normal on the black load wire on either side of the fuse; despite brown discoloration on the end of the fuse, the wire element looks unbroken by my assessment
The dishwasher has been used sparingly and otherwise worked great. The only service done was a Maytag recommended replacement of the heater element (complimentary) appx 2 months ago. Any ideas welcome. Thank you for your time and input.